About this Abstract |
| Meeting |
MS&T25: Materials Science & Technology
|
| Symposium
|
Controlled Synthesis, Processing, and Applications of Structural and Functional Nanomaterials
|
| Presentation Title |
Challenges in manufacturing of composite powders for laser powder bed fusion |
| Author(s) |
Naoyuki Nomura, Weiwei Zhou, Zhenxing Zhou, Mingqi Dong |
| On-Site Speaker (Planned) |
Naoyuki Nomura |
| Abstract Scope |
Additive Manufacturing (AM) is a novel manufacturing method that enables the production of complex-shaped parts that were difficult to manufacture using conventional methods such as casting or machining. In the laser powder bed fusion (L-PBF), which is one of the AM process, rapid heating and cooling for melting and solidification are repeatedly performed to the powder layer, enabling manufacturing in a non-equilibrium state and realizing alloying or mixing hard to melt materials. Recently, we fabricated titanium-based composite powders for AM using hetero-agglomeration method. Graphene oxides were attached tightly on the spherical titanium alloy powder surface. Flowability was improved due to the decrease of cohesive force between the powders. By conducting laser powder bed fusion, alloying of supersaturated carbon was confirmed in titanium. Also, we fabricated high-melting-point metal-based, and ceramic-based composite powders using freeze-dry pulsated orifice ejection methods. Their powder properties and the L-PBFed builds will be introduced. |